metallic materials 2.02

Question 1

Name examples of metallic materials

Answer 1

-steel
-aluminum
-cooper
-zinc
-alloys

Question 2

properties of metallic materials

Answer 2

-high tensile and compressive strength
-stiffness (E-modulus)
-metal bonding
-high electrical ad thermal conductivity
-formable/shapeable
-recyclable

Question 3

Name some of the most common alloying elements for metal

Answer 3

-carbon
-silicon
-manganese
-sulphur, phosphorus, nitrogen

Question 4

characteristics of carbon alloy

Answer 4

-cheapest and most effective
-increase tensile strength
-increase yield strength

Question 5

characteristics of silicon alloy

Answer 5

-positive effect on the strength and viscosity for non-annealed steels
-for hardened and tempered steels critical cooling point rate reduces and increase temperature resistance

Question 6

characteristics of manganese alloy

Answer 6

-increased the strength and viscosity of ferrite mixed crystals
-enhance weldability
-reduction of critical cooling rate

Question 7

characteristics of Sulphur, phosphorous and nitrogen alloys

Answer 7

-for processing very low amount
-cause aging and brittleness

Question 8

name elements that are added to stainless steel alloys

Answer 8

Cu, Cr, Ni, Mo, Mn

Question 9

what does the thermal treatment influence in metals?

Answer 9

-hardness
-toughness
-strength
-wear resistance

Question 10

what does the annealing process do to metals?

Answer 10

it soften the material

Question 11

what does the hardening process do to metals?

Answer 11

increases the hardness and strength of material

Question 12

what does the tempering process do to metals?

Answer 12

reduces the brittleness of metals

Question 13

Name types of mechanical properties of metals

Answer 13

-Plasticity
-elasticity
-fractures
-fatigue

Question 14

name crystallographic defects types

Answer 14

-0D points defects
-1D line defects
-2D planar defects
-3D bulk defects

Question 15

example of 0D point defects

Answer 15

-Vacancies
-interstitials
-antisites

Question 16

example of 1D line defects

Answer 16

dislocations

Question 17

example of 2D planar defects

Answer 17

-grain boundaries
-stacking faults
-twin boundaries

Question 18

example of 3D bulk defects

Answer 18

-pores
-cracks
-inclusions
-impurities
-precipitates

Question 19

Mechanisms of plastic deformations

Answer 19

-translation of crystal planes
-twinning
-grain boundary displacement

Question 20

name a type of mechanical fracture

Answer 20

necking

Question 21

name types of mechanical linkages

Answer 21

rivets, screws

Question 22

name types chemical-physical linkages

Answer 22

-welding
-soldering
-adhesives

Question 23

how and what does corrosion causes?

Answer 23

-physicochemical interaction between material and environment
-change material properties
-impairment of materials functions
-corrosion system, corrosion effects, corrosion damage

Question 24

what are some of the main types of corrosion?

Answer 24

-chemical corrosion
-electrochemical corrosion
-physical corrosion (stress induced)

Question 25

definition of corrosion

Answer 25

Reaction of a material with his environment with a measurable change in materials properties (durability)